Brand: Fisher

Fisher 67C Series Instrument Supply Regulator

Name: Fisher 67C Instrument Regulator – Datasheet & Price Quote
Brand: Fisher

Description

Overview

The Fisher 67C Series Instrument Supply Regulator is a compact, direct-operated regulator from Emerson designed to provide a constantly controlled, reduced supply pressure to pneumatic and electro-pneumatic controllers, positioners, and other field instruments. Unlike the larger pilot-operated regulators used for main process or distribution pressure control, the Fisher 67C is a small, panel-mountable device built specifically to condition instrument air or gas supply, and its filter regulator variant additionally removes particulate contamination before it reaches sensitive downstream instrumentation.

With engineering support in Muscat, Seven Star LLC supplies the Fisher 67C Series Instrument Supply Regulator to process plants, gas facilities, and instrumentation panels throughout the Sultanate of Oman and the wider GCC, with correct set-point guidance and local technical backing. Instrumentation teams in Muscat, Sohar, and across the region can source 67C regulators through Seven Star LLC with a formal quotation and the manufacturer datasheet.

Operating Principle

The Fisher 67C is a direct-operated spring-loaded regulator: an internal spring, adjustable through the top-mounted adjusting screw, loads a diaphragm that positions the regulator’s internal valve plug to reduce supply pressure to the set downstream value. As downstream demand or upstream supply pressure varies, the diaphragm continuously repositions the plug to hold outlet pressure close to the spring’s set point, delivering the stable, low-pressure air or gas supply that pneumatic controllers and positioners require to function accurately.

A Smart Bleed internal check valve is a key protective feature of the 67C’s operating principle: if upstream supply pressure is lost, this check valve relieves pressure from the outlet side, preventing a trapped high-pressure condition from being applied to downstream instruments once supply is restored. An internal relief function additionally protects connected instruments from overpressure conditions that could otherwise arise from a regulator malfunction or an unexpected supply pressure surge.

Engineering Design of the Fisher 67C

The Fisher 67C Series is built in a compact body suitable for direct panel mounting on instrument racks and control panels, minimizing the footprint required to supply clean, regulated air to each individual field instrument on a skid or panel. Optional stainless steel material construction extends the regulator’s service life in corrosive or coastal atmospheres, an important consideration for offshore platforms and coastal GCC process facilities where standard plated-steel hardware corrodes rapidly.

The filter regulator variant of the 67C combines particulate filtration with pressure reduction in a single compact body, removing pipeline scale, rust, and other solid contaminants from the instrument air supply before they can foul the small orifices and nozzles inside downstream pneumatic controllers and positioners. This combined function reduces the number of separate instrument air conditioning components a panel builder needs to specify, simplifying both the bill of materials and the physical panel layout for instrumentation skids.

Key Features

The Fisher 67C Series delivers compact, reliable instrument-grade pressure regulation with built-in protective features for pneumatic control loops.

The compact body design supports direct panel mounting on instrument racks and control panels without excessive footprint.
The 67C functions as a dedicated instrument supply regulator, delivering constantly controlled reduced pressure to pneumatic instruments.
Optional stainless steel material construction extends service life in corrosive or coastal process environments.
An internal relief function protects connected instruments from overpressure conditions arising from regulator malfunction or supply surges.
The Smart Bleed internal check valve relieves outlet pressure automatically when supply pressure is lost, protecting downstream instruments.
Filter regulator variants combine particulate filtration with pressure reduction in a single compact body.
The regulator suits most air or gas applications, including air chucks, air jets, and spray gun supply beyond standard instrument use.
Simple top-mounted adjustment allows straightforward set-point calibration without disassembling the regulator body.

Industrial Applications

The Fisher 67C Series Instrument Supply Regulator is a standard component on instrumentation panels across oil and gas production, petrochemical processing, power generation, and water treatment facilities wherever pneumatic controllers, positioners, or transmitters require a clean, stable reduced-pressure air or gas supply. Its compact panel-mount form factor makes it a practical choice for retrofitting instrument air conditioning onto existing control panels with limited available space.

Backed by manufacturer datasheet documentation, Seven Star LLC distributes the 67C to plant operators, panel builders, and EPC contractors across Oman and the GCC, supporting instrumentation packages for oil and gas, petrochemical, and utility projects in the Sohar and Salalah economic zones as well as industrial developments around Muscat. Buyers sourcing the Fisher 67C through Seven Star LLC’s trusted supply channel receive genuine Emerson-manufactured regulators along with local engineering support for set-point selection and material specification.

Technical Specifications

The table below summarizes the primary Fisher 67C specifications relevant to instrument air conditioning applications.

Parameter	Specification
Model	Fisher 67C Series Instrument Supply Regulator
Regulator Type	Direct-operated, spring-loaded instrument supply regulator
Variants	Standard regulator and filter regulator (combined filtration and pressure reduction)
Mounting	Compact panel-mounting design
Material Options	Standard construction; optional stainless steel for corrosive environments
Protective Features	Internal relief; Smart Bleed internal check valve for lost-supply protection
Typical Applications	Pneumatic and electro-pneumatic controllers, instruments, air chucks, air jets, spray guns

Request a Quote for Fisher 67C Series Instrument Supply Regulator

Seven Star LLC invites instrumentation engineers and procurement teams across Oman and the GCC to submit a formal RFQ for the Fisher 67C Series Instrument Supply Regulator. Working closely with plant engineers in the region, Seven Star LLC supplies on request with lead time confirmed at quotation, provides full technical datasheets on request, and connects buyers directly with our instrumentation division for set-point and material selection support. Contact Seven Star LLC today to request a quotation for a Fisher 67C regulator with local engineering support.

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About brand

Fisher is the control valve brand of Emerson. Its history starts in 1880 in Marshalltown, Iowa, where William Fisher, working at the town waterworks, invented a constant-pressure pump governor and founded a company to make it. Emerson bought Fisher Controls in 1992, and Marshalltown remains a main engineering and manufacturing site for Fisher valves. The brand covers control valves, actuators, FIELDVUE digital valve controllers, regulators and level controllers.

Seven Star LLC is an independent supplier listing Fisher control valves, actuators, positioners, regulators and spare parts for buyers in Oman and the GCC. Replacement valves and trim are matched from the serial number on the valve nameplate.

Fisher company profile

Origin	William Fisher's constant-pressure pump governor, Marshalltown, Iowa, USA (1880)
Ownership	Owned by Monsanto from 1969; sold to Emerson in 1992 and combined with Rosemount as Fisher-Rosemount, later Emerson Process Management. Today a brand of Emerson.
Main site	Marshalltown, Iowa, USA
Product families	Sliding-stem and rotary control valves, spring-diaphragm and piston actuators, FIELDVUE digital valve controllers, pressure regulators, displacer and digital level controllers
Typical duty	Throttling control of liquids, gas and steam, high-pressure and severe service, instrument supply and gas pressure reduction

Milestones

1880: William Fisher builds a constant-pressure pump governor in Marshalltown, Iowa.
1969: Monsanto acquires Fisher Controls.
1992: Emerson buys Fisher and combines it with Rosemount as Fisher-Rosemount, later Emerson Process Management.

Fisher valves, actuators and instruments

Series	Type	Typical use
easy-e ES, ET, EZ	Sliding-stem globe and angle valves	Cage-guided globe valves: ES with unbalanced plug, ET with balanced trim for higher pressure drop; EZ unbalanced with a seat ring retainer for viscous or dirty fluids
GX	Compact globe valve with integral actuator	Standard chemical and process duty where a compact valve package is preferred
HPT, HPAT	High-pressure globe and angle valves	Pressure classes up to ASME CL2500, compressor recycle and high-pressure letdown
V150, V200, V300, V250	Vee-Ball segmented ball and full-bore ball control valves	High-capacity control of liquids, gas and fibrous or slurry service
CV500	Eccentric rotating plug valve	Erosive, coking and dirty service
8560, 8580	High-performance butterfly valves	Large-line throttling and on-off control
657, 667, 1052, 1061, easy-Drive	Spring-diaphragm, piston and electric actuators	657 and 667 for sliding-stem valves; 1052 and 1061 for rotary valves; easy-Drive where no air is available
FIELDVUE DVC6200, DVC2000, 3610J	Digital valve controllers and positioners	HART positioning with valve diagnostics; 3610J pneumatic positioner for rotary actuators
627, 1098-EGR, 67C	Pressure regulators	Gas pressure reduction, pilot-operated regulation and instrument air supply
DLC3100, 2500	Digital and pneumatic level controllers	Displacer level and interface on separators and scrubbers

Where Fisher valves are used

Fisher control valves and regulators are standard equipment in oil and gas production, refineries, gas processing and LNG, petrochemicals, power plants and water systems. Typical loops are separator level and pressure, compressor anti-surge and recycle, fuel gas pressure reduction, feedwater and steam control, and chemical dosing. FIELDVUE controllers add diagnostics that help plan valve maintenance before a turnaround.

Ordering Fisher valves and spare parts: what we need

For spares, send the serial number from the valve nameplate together with the valve type, size, pressure class, trim and actuator type and size. Emerson keeps the build record behind the serial number, so plug, seat ring, cage, packing and diaphragm kits can be matched without guesswork. For a FIELDVUE or regulator, send the full model and type number and the mounting details. For a new valve add the process data: fluid, flow range, inlet and outlet pressure, temperature, leakage class, fail position, air supply and signal.

Facts checked against Emerson Fisher product information and published company histories, October 2026.

Browse Fisher products by category: Control Valves, Valve Actuator, Valve Positioner, Regulators, Level Transmitter.

Frequently Asked Questions

What is the purpose of the Fisher 67C Series regulator?

The 67C provides a constantly controlled, reduced supply pressure to pneumatic and electro-pneumatic controllers and other field instruments, ensuring stable instrument air or gas supply for accurate control.

What does the Smart Bleed feature on the Fisher 67C do?

The Smart Bleed internal check valve automatically relieves pressure from the outlet side of the regulator if upstream supply pressure is lost, preventing a trapped overpressure condition when supply is restored.

Is a filtration option available for the Fisher 67C?

Yes. Filter regulator variants of the 67C combine particulate filtration with pressure reduction in a single compact body, protecting downstream instrument orifices and nozzles from contamination.

Can the Fisher 67C be used in corrosive or coastal environments?

Yes. Optional stainless steel material construction is available, extending the regulator's service life in corrosive or coastal process environments common across the GCC.

Is Seven Star LLC an experienced supply partner for Fisher products?

Yes, Seven Star LLC is an experienced supplier of Fisher in Oman and the GCC, supplying Emerson-manufactured regulators, valves, and instrumentation with local technical support.

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